Bratwurst, beer, and even tattoos being done onsite. Throughout the amazing experiences offered to attendees at DMEXCO 2017, ad tech and its ever growing landscape remained the constant. Hot topics including viewability, transparency, and GDPR were the focus of the thousands of publishers, advertisers, and ad tech companies in attendance.Although I had a great time in Cologne connecting with partners; customer experiences were the key focus of DMEXCO. Here are my takeaways: